Lindhardsen and colleagues’ study found that increased risks of stroke and atrial fibrillation were associated with rheumatoid arthritis in the Danish population.1 The incidence rate ratio of stroke for people with rheumatoid arthritis was 1.33 (95% confidence interval 1.22 to 1.46) for women and 1.34 (1.19 to 1.51) for men. The findings are similar to the increased risk of cardiovascular disease …